Small fix

app/src/main/java/eu/faircode/email/Core.java

@@ -2929,7 +2929,7 @@ class Core {
                 MessageHelper helper = new MessageHelper((MimeMessage) imessages[imessages.length - 1], context);
                 String msgid = helper.getMessageID();
                 if (msgid != null) {
-                    int count = db.message().countMessageByMsgId(folder.id, msgid);
+                    int count = db.message().countMessageByMsgId(folder.id, msgid, true);
                     if (count == 1) {
                         Log.i(account.name + " POP having last msgid=" + msgid);
                         sync = false;

app/src/main/java/eu/faircode/email/DaoMessage.java

@@ -452,8 +452,9 @@ public interface DaoMessage {
 
     @Query("SELECT COUNT(*) FROM message" +
             " WHERE folder = :folder" +
-            " AND msgid = :msgid")
-    int countMessageByMsgId(long folder, String msgid);
+            " AND msgid = :msgid" +
+            " AND (:hidden OR NOT message.ui_hide)")
+    int countMessageByMsgId(long folder, String msgid, boolean hidden);
 
     @Query("SELECT COUNT(*) FROM message" +
             " JOIN folder_view AS folder ON folder.id = message.folder" +

app/src/main/java/eu/faircode/email/EntityOperation.java

@@ -334,7 +334,7 @@ public class EntityOperation {
                 if (premove &&
                         message.uid != null &&
                         !TextUtils.isEmpty(message.msgid) &&
-                        db.message().countMessageByMsgId(target.id, message.msgid) == 0) {
+                        db.message().countMessageByMsgId(target.id, message.msgid, false) == 0) {
                     File msource = message.getFile(context);
 
                     // Copy message to target folder